Casting mouth heating for line composing and casting machines



Aug. 20, 1935. K DE 2,011,702

CASTI NG MOUTH HEATING FOR LINE CCMPOSING AND CASTIN G MACHINES FiledMay 5, 1933 Patented Aug. 20, 1935 PATENT OFFICE CASTING MOUTH HEATINGFOR LINE COMPOSING AND CASTING MACHINES Kaspar Bader, London, EnglandApplication May 5, 1933, Serial No. 669,516

In Germany January 30, 1933 In the casting operation by means of theknown line composing and casting machines the liquid metal is forcedfrom the casting pot into the casting mould by a plunger or pumping ac-6 tion. During that operation the mouth of the casting. pot is pressedagainst the casting mould. As the casting mould has the function ofshaping the cast characters and cooling them it follows that it must beconsiderably cooler than the 1 mouth of the pot and that there is a heatexchange operation between the mouth and the casting mould due to whichthe mouth of the pot is apt to become rapidly chilled.

For that reason in gas heated pots a relatively 'large number of gasjets has been placed under the mouth thereof for re-heating it after thecool- 8.

More recently electrical heating has however been generally adopted andthe above considerations had to be particularly borne in mind.

For this purpose heating elements intended to perform the function ofthe gas flames have been associated with different parts of the pot. Inmost cases these heating bodies were controlled 26 either directly byseries resistances or by connection in series or parallel.

Where electric heating bodies are disposed on or within the neck orthroat of the casting not no matter how close to the mouth, the sectionswhich 80 are immediately adjacent the heating body are still apt tobecome materially hotter than those at the actual face of the castingterminal so that in practice the object to equalize the heat losses atthe actual mouth terminal apt to occur dur- "ing casting by .the contactwith the mould has not been properly achieved.

Now this invention relates to a device which is adapted to overcome theabove defects in that it is capable of being directly associated withthe terminal plate of the mouth of the pot without in any wayinterfering with the flow of the metal through the mouth thereof whilebeing entirely independent of any other heating body or device that maybe applied to the pot at other points.

By way of example the invention is illustrated in the accompanyingdrawing in which:

Fig. l illustrates the terminal of a casting pot for use in an Intertypemachine fitted however witha heating device according to this invention.

Fig. 2 shows the same arrangement in a perspective view and Fig. 3 is aperspective view of the heater by itself.

Fig. 4 shows a heater according to this inven- 10 Claims. (01. 2271)tion adapted to be fitted to a pot terminal of modified form. v

In Fig. 2 a heating body shown at I is arranged directly beneath theneck 4 of the pot,

the terminal plate 2 containing the casting holes 5..

5 being separated from the heater by the body portion 3 of the mouth. InFigs. 1 and 2 the face portion ill of the terminal plate is mitred at Himmediately below the casting holes 5 and to the face portion 8 belowsaid edge is fitted a heating device. This heating device comprises aplate-shaped portion 9 and a housing I! adapted to accommodate asuitable heating body. The device I is made of a material of a very goodcoefficient of heat conduction and when fitted as 15 shown in Figs. 1and 2 beneath the outlet apertures 5 of the casting mouth with theheated housing portion l2 situated directly beneath the end of theterminal plate thereof, the heat produced rapidly reaches the point ofutilization and 0 on the other hand the deposition of drops of metal onthe face 8 is avoided because the wall of the heating body housingalways has a higher temperature than the casting mouth itself.

With this arrangement the former heating body used in the throat or onthe neck itself indicated at I in Fig. 2 can be made of considerablysmaller heating power because it now has only the function of keepingthe neck of the casting mouth warm. Experiments have shown that Q halfthe energy previously expended is sufiicient.

Further while overheating with this device may be easily avoided it hasbeen found that if it does occur at the actual mouth it assists ratherin that the small outlet holes 5 always remain clean and a burning ofthe metal cannot take place since after casting there is in practice nometal left in the mouth, the latter in fact being always immediatelyready for use.

The greatest advantage however is that the metal in the interior of themelting pot and in the neck can be kept considerably cooler thanhitherto because the outlet is always clean and hot enough.

In the case of machines having a casting terminal plate screwed to themouth of the neck as shown in Fig. 4 the fitting of the device 1 ispreferably eflected as shown in Fig. 4. Here the plate portion 9 of theheating device extends substantially centrally from the housing portionI2 and is fitted between the terminal casting plate of the mouth and thelatter itself with the heated housing l2 directly beneath and in contactwith the corresponding ends of the mouth of the pot and its terminalplate. A slot in the plate portion is adapted to register with thechannel in the neck of the pot and with the casting holes 5 for a smoothflow of the metal.

In both constructions the device can be secured by screws as shown orany other convenient manner and means can of course be provided enablingthe temperature of the casting mouth to be automatically controlled byregulating the effect of the heating body in the housing without risk ofcontinuously overheating the metal.

I claim:

1. A heating device for the mouth of a casting pot for line composingand casting machines, comprisin a heating body operable independently ofheating means applied to portions of the pot other than the mouththereof, and a. conducting member directly associated with the terminalplate of said mouth and adapted to house said heating body.

2. A heating device for the mouth of a casting pot for line composingand casting machines, comprising a heating member directly associatedwith a terminal plate for said mouth, including in combination a heatingbody, a housing adapted to accommodate said heating body, and aplatelike portion extending from said housing and adapted to be fittedto the casting face of said terminal plate of the mouth.

3. In a casting pot for line composing and casting machines, a heatingdevice for the mouth of said pot, comprising in combination a heatingbody associated with a terminal plate for said mouth, a housing for theaccommodation of said heating body, and a platelike portion extendingfrom said housing and adapted to be fitted between the mouth of the potand said terminal plate thereof.

4. In a casting pot for line composing and casting machines, a heatingdevice comprising in combination, a heating body for the mouth only ofsaid pot, a housing adapted to accommodate said heating body, and aplate-like portion associated with said housing and shaped to fit thecasting mouth on the terminal plate of the mouth immediately below metaldelivery openings in said terminal plate.

5. In a casting pot for line composing and casting machines, a heatingdevice comprising in combination, a heating body for the mouth only ofsaid pot, a housing for accommodating said heating body, and aplate-like portion integral with said housing and shaped to fit thecasting mouth on the terminal plate of the mouth and when fitted tocover the whole of the face of said terminal plate immediately below thedelivery holes therein to prevent deposition thereon oi dripping metal,said housing being offset therefrom and in direct contact with one endof said terminal plate.

6. In a casting pot for line composing and casting machines, a heatingdevice comprising in combination, means for heating the mouth of saidpot independently of heating means applied to other portions of the pot,a housing adapted to accommodate the first said heating means, and aplate-like portion extending substantially centrally therefrom andadapted to be secured between the mouth of the pot and the terminalplate thereof, with the housing in direct contact with the correspondingends of both said mouth and said terminal plate.

7. In a casting pot for line composing and casting machines, a heatingdevice for heating the mouth of said pot, comprising in combination, aseparate heating body for heating the mouth of said pot independently ofheating means applied to other portions of the pot, a. housing adaptedto accommodate said heating body, and a plate-like portion adapted to befitted between the mouth of the pot and the terminal plate thereof andprovided with an opening in register with the channel in said mouth andwith the delivery openings in said terminal plate for the passage of themetal therethrough.

8. In a casting pot of a line composing and casting machine, anelectrical heating device for making possible a substantial reduction ofthe heating of the casting pot, comprising a heating member arrangedindependently of the heating member or members for the throat of thepot, and a plate of good heat conducting material extending from saidheating member directly to the casting mouth.

9. In a. casting pot of a line composing and casting machine, anelectrical heating device for making possible a substantial reduction ofthe heating of the casting pot, comprising a heating member arrangedindependently of the heating member or members for the throat of thepot, and a plate of good heat conducting material extending from saidheating member to directly beneath outlet apertures for the pot, saidplate covering the front of the casting mouth beneath the outletapertures and thus preventing deposition thereon of falling drops ofmetal.

10. In a casting pot for line composing and casting machines, a devicecapable of being directly associated with a terminal plate for the mouthof the pot, comprising a housing adapted to accommodate heating means,and a plate-like portion extending from said housing and adapted toconduct heat from said housing to said terminal plate.

KASPAR BADER.

